新增外购直拨单提示Object reference not set to an instance of an object

如题，之前新增外购直拨单正常，今天开始，所有客户端新增外购直拨单时均提示“Object reference not set to an instance of an object”
发生时间：11:45:22
错误来源： Kingdee.K3.DE.CentralDistribution.Business.PlugIn
错误信息：Object reference not set to an instance of an object.
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调用堆栈：
at Kingdee.K3.DE.CentralDistribution.Business.PlugIn.PurDirectlyAllocatedEdit.AfterBindData(EventArgs e)
at Kingdee.BOS.Core.DynamicForm.PlugIn.DynamicFormViewPlugInProxy.FireAfterBindData(EventArgs e)
at Kingdee.BOS.Web.Bill.BillView.UpdateView()
at Kingdee.BOS.Web.Bill.BillView.LoadData()
at Kingdee.BOS.Web.DynamicForm.DynamicWebFormController.LoadData()
错误数据： System.Collections.ListDictionaryInternal

请帮忙看一下，谢谢！